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7 papers · 2 filters
Bipartite states of low rank are almost surely entangled
Mary Beth Ruskai, Elisabeth M. Werner
We show that a bipartite state on a tensor product of two matrix algebras is almost surely entangled if its rank is not greater than that of one of its reduced density matrices.
The Phononic Casimir Effect: An Analog Model
L. H. Ford, N. F. Svaiter
We discuss the quantization of sound waves in a fluid with a linear dispersion relation and calculate the quantum density fluctuations of the fluid in several cases. These include…
Decoherence and Recoherence in Model Quantum Systems
Jen-Tsung Hsiang, L. H. Ford
We discuss the various manifestations of quantum decoherence in the forms of dephasing, entanglement with the environment, and revelation of "which-path" information. As a specific…
Quantum Density Fluctuations in Classical Liquids
L. H. Ford, N. F. Svaiter
We discuss the density fluctuations of a fluid due to zero point motion. These can be regarded as density fluctuations in the phonon vacuum state. We assume a linear dispersion rel…
Recoherence by Squeezed States in Electron Interferometry
Jen-Tsung Hsiang, L. H. Ford
Coherent electrons coupled to the quantized electromagnetic field undergo decoherence which can be viewed as due either to fluctuations of the Aharonov-Bohm phase or to photon emis…
Qubit channels with small correlations
Filippo Caruso, Vittorio Giovannetti, Chiara Macchiavello +1
We introduce a class of quantum channels with correlations acting on pairs of qubits, where the correlation takes the form of a shift operator onto a maximally entangled state. We…